docs(api): updated examples and description of CAS and CAD
docs(api): updated examples and description of CAS and CAD

zaphod-concur/etcd,offscale/etcd,sofuture/etcd,princeqjzh/etcd,hongchaodeng/etcd,bakins/etcd,wowsoso/etcd,gityf/etcd,arthurcolle/etcd,joshix/etcd,armstrongli/etcd,wantonsolutions/dinv-etcd,Ulexus/etcd,justintung/etcd,gtank/etcd,ylong/etcd,dnaeon/etcd,buaazp/etcd,junxu/etcd,TheHippo/etcd,insionng/etcd,westhood/etcd,StorReduce/etcd,tguangch/etcd,mgoelzer/etcd-fork2,etcd-io/etcd,sebschrader/etcd,ylong/etcd,armstrongli/etcd,cvik/etcd,coreos/etcd,glycerine/etcd,hzy001/etcd,gae123/etcd,wfxiang08/etcd,beni55/etcd,insequent/etcd,youxidev/etcd,gosharplite/etcd,qiaochao911/etcd,linuxcer/etcd,handsomesun/etcd,chenbaihu/etcd,sinsharat/etcd,hpcloud/etcd,jchauncey/etcd,jmptrader/etcd,sinsharat/etcd,gae123/etcd,csuideal/etcd,msanterre/etcd,csuideal/etcd,bdarnell/etcd,lorneli/etcd,barakmich/etcd,shafreeck/etcd,mitake/etcd,onlyjob/etcd,giantswarm/etcd,OyTao/etcd_learning,glevand/coreos--etcd,openedbox/etcd,qqsun8819/etcd,wantonsolutions/dinv-etcd,handsomesun/etcd,mike-lerch/etcd,QuantiumTechnology/etcd,luxas/etcd,jlamillan/etcd,youxidev/etcd,lumjjb/etcd,openedbox/etcd,Winslett/etcd,shakefu/etcd,pengzj/etcd,sofuture/etcd,jravetch/etcd,axingblog/etcd,xueshanf/etcd,junxu/etcd,yifan-gu/etcd,improbable-io/etcd,achanda/etcd,nekto0n/etcd,nieanan/etcd,olark/etcd,ajityagaty/etcd,OyTao/etcd_learning,tangkun75/etcd,a-robinson/etcd,chai2010-playground/etcd,cvik/etcd,combk8s/etcd,xiang90/etcd,Eagle-X/etcd,chipironcin/etcd,svdata/etcd,mkumatag/etcd,tamird/etcd,tempbottle/etcd,jlamillan/etcd,li-ang/etcd,oscarrr110/etcd,achanda/etcd,hzy001/etcd,yyljlyy/etcd,honeyqa/etcd,hpcloud/etcd,snailwalker/etcd,jeremyeder/etcd,mqliang/etcd,msanterre/etcd,sebrandon1/etcd,xdlinear/etcd,hongbinz/etcd,visheshnp/etcd,shawnps/etcd,shawnps/etcd,YuleiXiao/etcd,pauldallen/etcd,CrazyJvm/etcd,SivagnanamCiena/etcd,spacejam/etcd,rchicoli/etcd,chai2010-playground/etcd,imzhulei/etcd,spotify/etcd,ravigadde/etcd,glycerine/etcd,imzhulei/etcd,bspline/etcd,rnaveiras/etcd,barakmich/etcd,endocode/etcd,dnaeon/etcd,Winslett/etcd,wantonsolutions/dinv-etcd,heyitsanthony/etcd,lzbgt/etcd,bdarnell/etcd,ajityagaty/etcd,honeyqa/etcd,ktateish/etcd,wowsoso/etcd,vimalk78/etcd,njucslqq/etcd,fasaxc/etcd,steveeJ/etcd,sebrandon1/etcd,bspline/etcd,plasticbox/etcd,axingblog/etcd,betawaffle/etcd,bakins/etcd,heyitsanthony/etcd,iamqizhao/etcd,mwitkow/etcd,mqliang/etcd,arthurcolle/etcd,elimisteve/etcd,spotify/etcd,fasaxc/etcd,mwitkow-io/etcd,njharman/etcd,cvik/etcd,chipironcin/etcd,whuwxl/etcd,jchauncey/etcd,xueshanf/etcd,joshix/etcd,fasaxc/etcd,cockroachdb/etcd,delkyd/etcd,iamqizhao/etcd,bluebreezecf/etcd,bluebreezecf/etcd,crandles/etcd,mkumatag/etcd,gityf/etcd,freeloop1114/etcd,snailwalker/etcd,xdlinear/etcd,jefby/etcd,robszumski/etcd,zaphod-concur/etcd,spacejam/etcd,Yhgenomics/etcd,Ulexus/etcd,cockroachdb/etcd,yichengq/etcd,raoofm/etcd,QuantiumTechnology/etcd,chenbaihu/etcd,plasticbox/etcd,fgbreel/etcd,es-chow/etcd,polvi/etcd,kkaneda/etcd,insequent/etcd,YuleiXiao/etcd,ecnahc515/etcd,raoofm/etcd,CrazyJvm/etcd,delkyd/etcd,spotify/etcd,steveeJ/etcd,xychu/etcd,dalanlan/etcd,devfreesg/etcd,luxas/etcd,asim/etcd,mischief/etcd,tguangch/etcd,combk8s/etcd,shakefu/etcd,devfreesg/etcd,mike-lerch/etcd,dannysauer/etcd,coreos/etcd,svdata/etcd,jeremyeder/etcd,vimalk78/etcd,jonboulle/etcd,njucslqq/etcd,lzbgt/etcd,jefby/etcd,Ulexus/etcd,hongchaodeng/etcd,robszumski/etcd,jonboulle/etcd,cvik/etcd,improbable-io/etcd,njharman/etcd,wfxiang08/etcd,olark/etcd,cognusion/etcd,yudai/etcd,ecnahc515/etcd,StorReduce/etcd,qqsun8819/etcd,etcd-io/etcd,spotify/etcd,Eagle-X/etcd,glensc/etcd,giantswarm/etcd,ajityagaty/etcd,kingland/etcd,cchamplin/etcd,qiaochao911/etcd,HideoYamauchi/etcd,rnaveiras/etcd,akauppi/etcd,fanminshi/etcd,es-chow/etcd,mickep76/etcd,gouyang/etcd,visheshnp/etcd,gosharplite/etcd,dannysauer/etcd,jmptrader/etcd,Ulexus/etcd,nieanan/etcd,yifan-gu/etcd,gyuho/etcd,fgbreel/etcd,mwitkow/etcd,buaazp/etcd,elimisteve/etcd,lorneli/etcd,siddontang/etcd,mickep76/etcd,onlyjob/etcd,gtank/etcd,dterei/etcd,hongbinz/etcd,swingbach/etcd,polvi/etcd,betawaffle/etcd,nekto0n/etcd,princeqjzh/etcd,ravigadde/etcd,lumjjb/etcd,glensc/etcd,endocode/etcd,pauldallen/etcd,mwitkow-io/etcd,justintung/etcd,gyuho/etcd,ktateish/etcd,cchamplin/etcd,pengzj/etcd,gouyang/etcd,fanminshi/etcd,a-robinson/etcd,nkhare/etcd,chai2010/etcd,siddontang/etcd,purpleidea/etcd,xychu/etcd,rchicoli/etcd,sayden/etcd,chai2010/etcd,glevand/coreos--etcd,Timer/etcd,kingland/etcd,Yhgenomics/etcd,sayden/etcd,offscale/etcd,mischief/etcd,xebitstudios/etcd,dalanlan/etcd,purpleidea/etcd,xiang90/etcd,yyljlyy/etcd,hroyrh/etcd,oscarrr110/etcd,insionng/etcd,akauppi/etcd,HideoYamauchi/etcd,yichengq/etcd,etcd-io/etcd,Timer/etcd,SivagnanamCiena/etcd,li-ang/etcd,mkumatag/etcd,mitake/etcd,rnaveiras/etcd,hroyrh/etcd,nkhare/etcd,yudai/etcd,pigfoot/etcd,jravetch/etcd,mqliang/etcd,tangkun75/etcd,whuwxl/etcd,freeloop1114/etcd,crandles/etcd,westhood/etcd,shafreeck/etcd,sebschrader/etcd,beni55/etcd,kkaneda/etcd,asim/etcd,tamird/etcd,mgoelzer/etcd-fork2,xebitstudios/etcd,linuxcer/etcd,cognusion/etcd,swingbach/etcd,TheHippo/etcd,tempbottle/etcd,dterei/etcd